Cabletron Systems W85 Manual Do Utilizador

 

Introduction

 

The second mode of operation is using Cabletron Systems Inverse 
Multiplexer (IMUX) functionality to aggregate multiple DS1 connections 
into single higher bandwidth WAN connections. To operate in this mode, 
the user configures the appropriate IMUX groups containing the DS1 
connections. 

Along with the built-in management features (Network Tools) described 
in 

, the HSIM-W85 can be managed using SNMP. Statistical 

data can be accessed via SNMP by referencing the interface group defined 
in RFC 1213. 

 

The T1 data streams are terminated by T1 framers, which provide an 
HDLC bit stream to the HDLC controller. The controller receives data 
packets from each of the bit streams and places them in a memory 
subsystem. The on board CPU examines the packet and notifies the host 
of its arrival. Finally, a Cabletron proprietary ASIC transfers the data to 
the host platform. 

This process is followed in reverse when a packet is transmitted from the 
host platform out the T1 ports. The host platform notifies the HSIM-W85 
when a packet is coming and transfers the packet to the memory. The 
HDLC format is applied to the data, then the data is framed to a T1 
format, and passed to the framer. The T1 data is transmitted out through 
the T1 interface. 

 

The following are some of the highlights of the HSIM-W85 features:

 

Data Transfer Rates of 12 Mbps in full duplex, when running all eight 
T1s carrying continuous data traffic of 64-byte packets or larger.

 

High-level Data Link Control (HDLC) protocol

 

T1 Inverse Multiplexing (IMUX)

 

WAN IP Priority Queuing functionality

 

DS1 Alarm Thresholds

 

SNMP support